Utilizing exhaust-steam



(No Model.) 3 SneetsSheet 1.

D. RENSHAW. I

UTILIZING EXHAUST STEAM.

Patented Aug. '7, 1883.

INVENTO l I N4 PETERS, Phuwunw n mn Washington. n.0

(No Model) 3 SheetsE-Sheet 2. D. RENSHAW.

UTILIZING EXHAUST STEAM. No. 282,773. Patented Aug. 7, 1888.

a. I a

' INV NTOR WITNESSES 42 I v N. PETERS Wm. Wm, DJ;

3 Sheets-Sheet 3,

(No Model.)

D. RENSHAW.

UTILIZING EXHAUST STEAM.

Patented Aug. 7, 1883.

WITNESSES NI PE'IERS. mm n m Wash ngton ac ject of a separate application.

NITED STATES PATENT OFFICE.

'DAVID RENSHAW, or BRAINTREE, MASSACHUSETTS.

UTILIZING EX'HAUST-STEAIVI.

SPECIFICATION forming part of Letters Patent No. 232,773, dated August 7, 1883. Application filed January 6, 18811- (No model.)

thereon, which form part of this specification.

This invention relates to the class of patents granted to me for utilizing the exhaust of engines, and has for its object the economy of fuel and water, cheapness in construction, and

simplicity in arrangement, the first cost. I

Heretofore the patents. granted to me for utilizing exhaust were more or less complicated and expensive. My present object is to simplify the construction, lessen the cost thereof, and enable me to return the exhaust to the main receiver with less expenditure of heat.

To this end my invention consists in the process hereinafter described, taking from the main reservoir working-steam for the engine,

greatly lessening also steam for taking off the exhaust, and compressing the same also for supplying the superheater with steam in which a higher pressure is maintained, and which pressure forces the compressed steam into the main receiver, from which all the steam originally emanated.

The drawings hereto annexed show one form of carrying my invention into effect, as it is obvious that many constructions within wide range may be employed for carrying out this process, and which it is thought unnecessary to illustrate in this application.

Figure 1 of the drawings shows a side elevation of the various portions of the apparatus with an end sectional view of a superheater. The superheater will form the sub- Fig. 2 shows a front elevation with a portion of the walls broken away for the purpose of more clearly illustrating the rear section of the superheater with its pipeconnections. view of the same. a

Ashows the main receiver, and Bthe engine; 0, the compressingcylinder, and D the super;

Fig. 3 is atop plan heater. a b c are the live-steanrsupply pipes to the engine, to the compressing-cylinder, and superheater, respectively. (1 e f are injectors ,to the compressor, superheater, and receiver.

9 is a pipe forming communication between the compressing-cylinder and the injector d, and h the exhaust-pipe from the engine to the injector f. The letter i denotes the superheatedsteam-supply pipe to injector d, and j is the I pipe from the front section of the superheater to the injector e. perheater D and injector 6, upon which pipe I locate a check-valve, Z, which prevents backpressure from the superheater. m is a small water-vessel, having a pipe, 41, leading from it to injector e, for the purpose of supplying a small quantity of water to the superheater for increasing the pressure in the Superheater when the apparatus is started for operation. 19 is the overflow-pipe. provided with suitable valves of ordinary construction. The setting of the Superheater may be of the ordinary kind; but preferably 1 place the furnace in front and the superheater behind the bridge-wall. the fierce heat of the furnace fails to come in direct contact with its walls, and th erefore less liable to burn; and, furthermore, the cold air entering at the door when open is prevented from striking directly upon it. More or less of the heat is brought in contact with the main receiver for the purpose of utilizing it and as sisting in making good the loss of heat by radiation. WVhen it is desired to cut off entirely the heat from the receiver A, a go-by flue is provided. V

Theoperation is as follows: Steam being raised in the receiver A, communication is opened with the back section of the superheater through pipe 0 and the injector e, and a small quantity of water from vessel m is also introduced simultaneously with the steam to injector e, by the expansion of which water in.

75 is the pipe connecting su- In this way All these pipes are roo into the back section of the superheater, thus forming a current of great velocity, at the same time maintaining an excessive pressure in the super-heater. The engineis now started and communication opened between the receiver A and injector f, by which means the exhaust is carried into the cylinder 0 and compressed to or near an equal pressure with said receiver A. Communication is now opened between compressing-cylinder G and injector (l, and by means of the latter and the higher pressure of the superheater the steam in the compressor is forced into the water body of receiver A, from which it may be again utilized. The process is constantly carried on and constantly repeated while the engine is in operation.

Having thus described my invention,'what I claim as new, and desire to secure by Letters Patent, is

1. The process herein described of utilizing the exhaust of engines, consisting of first raising steam to an excessive pressurefthen maintaining said pressure by passing live steam through a superheater to an injector, then 3. The combination, in an apparatus for utilizing the exhaust of engines, consisting of the receiver, the superheater, and the live and exhaust steam compressing cylinder, with intermediate mechanism of injectors and pipe connections, as described.

In testimony that I claim the foregoing as my own invention I afiix my signature in presence of two witnesses. 7

DAVID RENSHAWV.

\Vitnesses B. F. MoRsnLL, EUGENE D. CA'RUSL 

